Question

I need help with finding the zeros of the function: x^4+10x^2+9.

Answer 1

Factor it first to..

(x^2+9)(x^2+1)=0
x^2=-9 x^2=-1

x=+-3j x=+-j
where j is the sqrt of -1. There are no real zeroes.

Answer 2

but there are complex zeros